Television receiver scrambling system

Details Television receiver scrambling system Television receiver scrambling system

1981-06-19

1983-11-22

Murray, Richard

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358245, H04N 544

Patent

active

044172788

ABSTRACT:
Discloses a proximity detection system mounted in combination with a TV receiver adapted to disrupt the programs of the receiver at the times when objects of at least the dimensions of children are positioned within a designated distance from the television picture. Detection system includes actuation means supplying electrical power to energize detection system. An acoustic pulse transducer means produces discrete periodic acoustic pulses into the viewing area and detects acoustic signals reflected back from the viewing area. A comparator means receives a signal corresponding to each of electrical pulses and echo signals and produces an actuating signal as a function of the distance between the transducer and target object. A receiver program disruption means operates to disrupt the TV program during such time when object is within a designated distance from the transducer. The actuation means may include a switch actuated by an RF tuned induction pickup coil and the signal disruption means radiates a disruption signal at a frequency of several KHz.

REFERENCES:
patent: 3863196 (1975-01-01), Hilles
patent: 4321593 (1982-03-01), Ho et al.

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